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Ruapehu volcano (New Zealand): earthquake swarm

Sat, 30 Apr 2016, 05:42
05:42 AM | BY: T
Seismic recording at Ruapehu volcano today (Far West station / Geonet)
Seismic recording at Ruapehu volcano today (Far West station / Geonet)
An earthquake swarm has been occurring at the volcano since 26 April.
According to Geonet, such seismic swarms indicating small rock-fracturing events have been rare at the volcano in recent years. Ruapehu's typical seismic activity is rather dominated by events reflecting internal circulation of fluids such as tremor.
Another sign of unrest has been noted as well: the temperature of the crater lake has risen since Mid April from 25 to 40°C, although no other parameter (e.g. chemistry) has changed significantly.
Geonet stated that "we are uncertain of the implications of the recent observations. However at this time these changes at Ruapehu are not considered sufficient to change the Volcanic Alert Level" (which remains at 1).
There is no connection with the recent activity at White Island.

Previous news

Wed, 13 May 2015, 11:05

Ruapehu volcano (New Zealand): volcanic unrest decreases

The level of seismic activity has decreased. ... Read all
Sun, 3 May 2015, 22:46

Ruapehu volcano (New Zealand): seismic unrest, crater lake temperature decreases

Intermittent moderate to strong volcanic tremor has been observed at the volcano during the past 2-3 weeks, GNS Science reported. The seismic activity is among the strongest observed in the past 8 years. ... Read all
Show more
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano
Stratovolcano 2797 m / 9,176 ft
North Island (New Zealand), -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5) Ruapehu volcano eruptions:

Typical eruption style
Mildly explosive, formation of lahars
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